[dpdk-dev] [PATCH 7/9] net/mlx5: add port ID action to Direct Verbs

[Ori Kam <orika@mellanox.com>]

This commits adds the port ID action to DV steering.

Signed-off-by: Ori Kam <orika@mellanox.com>
---
 drivers/net/mlx5/mlx5.h         |   2 +
 drivers/net/mlx5/mlx5_flow.h    |  12 ++++
 drivers/net/mlx5/mlx5_flow_dv.c | 149 ++++++++++++++++++++++++++++++++++++++++
 drivers/net/mlx5/mlx5_glue.c    |  14 ++++
 drivers/net/mlx5/mlx5_glue.h    |   1 +
 5 files changed, 178 insertions(+)

diff --git a/drivers/net/mlx5/mlx5.h b/drivers/net/mlx5/mlx5.h
index 8d63575..016984d 100644
--- a/drivers/net/mlx5/mlx5.h
+++ b/drivers/net/mlx5/mlx5.h
@@ -281,6 +281,8 @@ struct mlx5_ibv_shared {
 	LIST_HEAD(modify_cmd, mlx5_flow_dv_modify_hdr_resource) modify_cmds;
 	LIST_HEAD(tag, mlx5_flow_dv_tag_resource) tags;
 	LIST_HEAD(jump, mlx5_flow_dv_jump_tbl_resource) jump_tbl;
+	LIST_HEAD(port_id_action_list, mlx5_flow_dv_port_id_action_resource)
+		port_id_action_list; /* List of port ID actions. */
 	/* Shared interrupt handler section. */
 	pthread_mutex_t intr_mutex; /* Interrupt config mutex. */
 	uint32_t intr_cnt; /* Interrupt handler reference counter. */
diff --git a/drivers/net/mlx5/mlx5_flow.h b/drivers/net/mlx5/mlx5_flow.h
index 9d72024..c419e6b 100644
--- a/drivers/net/mlx5/mlx5_flow.h
+++ b/drivers/net/mlx5/mlx5_flow.h
@@ -267,6 +267,16 @@ struct mlx5_flow_dv_jump_tbl_resource {
 	struct mlx5_flow_tbl_resource *tbl; /**< The target table. */
 };
 
+/* Port ID resource structure. */
+struct mlx5_flow_dv_port_id_action_resource {
+	LIST_ENTRY(mlx5_flow_dv_port_id_action_resource) next;
+	/* Pointer to next element. */
+	rte_atomic32_t refcnt; /**< Reference counter. */
+	void *action;
+	/**< Verbs tag action object. */
+	uint32_t port_id; /**< Port ID value. */
+};
+
 /*
  * Max number of actions per DV flow.
  * See CREATE_FLOW_MAX_FLOW_ACTIONS_SUPPORTED
@@ -289,6 +299,8 @@ struct mlx5_flow_dv {
 	struct ibv_flow *flow; /**< Installed flow. */
 	struct mlx5_flow_dv_jump_tbl_resource *jump;
 	/**< Pointer to the jump action resource. */
+	struct mlx5_flow_dv_port_id_action_resource *port_id_action;
+	/**< Pointer to port ID action resource. */
 #ifdef HAVE_IBV_FLOW_DV_SUPPORT
 	void *actions[MLX5_DV_MAX_NUMBER_OF_ACTIONS];
 	/**< Action list. */
diff --git a/drivers/net/mlx5/mlx5_flow_dv.c b/drivers/net/mlx5/mlx5_flow_dv.c
index b4ca9ca..f4b7f06 100644
--- a/drivers/net/mlx5/mlx5_flow_dv.c
+++ b/drivers/net/mlx5/mlx5_flow_dv.c
@@ -1058,6 +1058,70 @@ struct field_modify_info modify_tcp[] = {
 }
 
 /**
+ * Find existing table port ID resource or create and register a new one.
+ *
+ * @param dev[in, out]
+ *   Pointer to rte_eth_dev structure.
+ * @param[in, out] resource
+ *   Pointer to port ID action resource.
+ * @parm[in, out] dev_flow
+ *   Pointer to the dev_flow.
+ * @param[out] error
+ *   pointer to error structure.
+ *
+ * @return
+ *   0 on success otherwise -errno and errno is set.
+ */
+static int
+flow_dv_port_id_action_resource_register
+			(struct rte_eth_dev *dev,
+			 struct mlx5_flow_dv_port_id_action_resource *resource,
+			 struct mlx5_flow *dev_flow,
+			 struct rte_flow_error *error)
+{
+	struct mlx5_priv *priv = dev->data->dev_private;
+	struct mlx5_ibv_shared *sh = priv->sh;
+	struct mlx5_flow_dv_port_id_action_resource *cache_resource;
+
+	/* Lookup a matching resource from cache. */
+	LIST_FOREACH(cache_resource, &sh->port_id_action_list, next) {
+		if (resource->port_id == cache_resource->port_id) {
+			DRV_LOG(DEBUG, "port id action resource resource %p: "
+				"refcnt %d++",
+				(void *)cache_resource,
+				rte_atomic32_read(&cache_resource->refcnt));
+			rte_atomic32_inc(&cache_resource->refcnt);
+			dev_flow->dv.port_id_action = cache_resource;
+			return 0;
+		}
+	}
+	/* Register new port id action resource. */
+	cache_resource = rte_calloc(__func__, 1, sizeof(*cache_resource), 0);
+	if (!cache_resource)
+		return rte_flow_error_set(error, ENOMEM,
+					  RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
+					  "cannot allocate resource memory");
+	*cache_resource = *resource;
+	cache_resource->action =
+		mlx5_glue->dr_create_flow_action_dest_vport(priv->sh->fdb_ns,
+							    resource->port_id);
+	if (!cache_resource->action) {
+		rte_free(cache_resource);
+		return rte_flow_error_set(error, ENOMEM,
+					  RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
+					  NULL, "cannot create action");
+	}
+	rte_atomic32_init(&cache_resource->refcnt);
+	rte_atomic32_inc(&cache_resource->refcnt);
+	LIST_INSERT_HEAD(&sh->port_id_action_list, cache_resource, next);
+	dev_flow->dv.port_id_action = cache_resource;
+	DRV_LOG(DEBUG, "new port id action resource %p: refcnt %d++",
+		(void *)cache_resource,
+		rte_atomic32_read(&cache_resource->refcnt));
+	return 0;
+}
+
+/**
  * Get the size of specific rte_flow_item_type
  *
  * @param[in] item_type
@@ -3467,6 +3531,44 @@ struct field_modify_info modify_tcp[] = {
 }
 
 /**
+ * Translate port ID action to vport.
+ *
+ * @param[in] dev
+ *   Pointer to rte_eth_dev structure.
+ * @param[in] action
+ *   Pointer to the port ID action.
+ * @param[out] dst_port_id
+ *   The target port ID.
+ * @param[out] error
+ *   Pointer to the error structure.
+ *
+ * @return
+ *   0 on success, a negative errno value otherwise and rte_errno is set.
+ */
+static int
+flow_dv_translate_action_port_id(struct rte_eth_dev *dev,
+				 const struct rte_flow_action *action,
+				 uint32_t *dst_port_id,
+				 struct rte_flow_error *error)
+{
+	uint32_t port;
+	uint16_t port_id;
+	int ret;
+	const struct rte_flow_action_port_id *conf =
+			(const struct rte_flow_action_port_id *)action->conf;
+
+	port = conf->original ? dev->data->port_id : conf->id;
+	ret = mlx5_port_to_eswitch_info(port, NULL, &port_id);
+	if (ret)
+		return rte_flow_error_set(error, -ret,
+					  RTE_FLOW_ERROR_TYPE_ACTION,
+					  NULL,
+					  "No eswitch info was found for port");
+	*dst_port_id = port_id;
+	return 0;
+}
+
+/**
  * Fill the flow with DV spec.
  *
  * @param[in] dev
@@ -3524,10 +3626,24 @@ struct field_modify_info modify_tcp[] = {
 		const struct rte_flow_action_jump *jump_data;
 		struct mlx5_flow_dv_jump_tbl_resource jump_tbl_resource;
 		struct mlx5_flow_tbl_resource *tbl;
+		uint32_t port_id = 0;
+		struct mlx5_flow_dv_port_id_action_resource port_id_resource;
 
 		switch (actions->type) {
 		case RTE_FLOW_ACTION_TYPE_VOID:
 			break;
+		case RTE_FLOW_ACTION_TYPE_PORT_ID:
+			if (flow_dv_translate_action_port_id(dev, action,
+							     &port_id, error))
+				return -rte_errno;
+			port_id_resource.port_id = port_id;
+			if (flow_dv_port_id_action_resource_register
+			    (dev, &port_id_resource, dev_flow, error))
+				return -rte_errno;
+			dev_flow->dv.actions[actions_n++] =
+				dev_flow->dv.port_id_action->action;
+			action_flags |= MLX5_FLOW_ACTION_PORT_ID;
+			break;
 		case RTE_FLOW_ACTION_TYPE_FLAG:
 			tag_resource.tag =
 				mlx5_flow_mark_set(MLX5_FLOW_MARK_DEFAULT);
@@ -4131,6 +4247,37 @@ struct field_modify_info modify_tcp[] = {
 }
 
 /**
+ * Release port ID action resource.
+ *
+ * @param flow
+ *   Pointer to mlx5_flow.
+ *
+ * @return
+ *   1 while a reference on it exists, 0 when freed.
+ */
+static int
+flow_dv_port_id_action_resource_release(struct mlx5_flow *flow)
+{
+	struct mlx5_flow_dv_port_id_action_resource *cache_resource =
+		flow->dv.port_id_action;
+
+	assert(cache_resource->action);
+	DRV_LOG(DEBUG, "port ID action resource %p: refcnt %d--",
+		(void *)cache_resource,
+		rte_atomic32_read(&cache_resource->refcnt));
+	if (rte_atomic32_dec_and_test(&cache_resource->refcnt)) {
+		claim_zero(mlx5_glue->destroy_flow_action
+				(cache_resource->action));
+		LIST_REMOVE(cache_resource, next);
+		rte_free(cache_resource);
+		DRV_LOG(DEBUG, "port id action resource %p: removed",
+			(void *)cache_resource);
+		return 0;
+	}
+	return 1;
+}
+
+/**
  * Remove the flow from the NIC but keeps it in memory.
  *
  * @param[in] dev
@@ -4197,6 +4344,8 @@ struct field_modify_info modify_tcp[] = {
 			flow_dv_modify_hdr_resource_release(dev_flow);
 		if (dev_flow->dv.jump)
 			flow_dv_jump_tbl_resource_release(dev_flow);
+		if (dev_flow->dv.port_id_action)
+			flow_dv_port_id_action_resource_release(dev_flow);
 		rte_free(dev_flow);
 	}
 }
diff --git a/drivers/net/mlx5/mlx5_glue.c b/drivers/net/mlx5/mlx5_glue.c
index a508faa..117190f 100644
--- a/drivers/net/mlx5/mlx5_glue.c
+++ b/drivers/net/mlx5/mlx5_glue.c
@@ -382,6 +382,18 @@
 }
 
 static void *
+mlx5_glue_dr_create_flow_action_dest_vport(void *ns, uint32_t vport)
+{
+#ifdef HAVE_MLX5DV_DR_ESWITCH
+	return mlx5dv_dr_create_action_dest_vport(ns, vport);
+#else
+	(void)ns;
+	(void)vport;
+	return NULL;
+#endif
+}
+
+static void *
 mlx5_glue_dr_create_flow_tbl(void *ns, uint32_t level)
 {
 #ifdef HAVE_MLX5DV_DR
@@ -847,6 +859,8 @@
 	.cq_ex_to_cq = mlx5_glue_cq_ex_to_cq,
 	.dr_create_flow_action_dest_flow_tbl =
 		mlx5_glue_dr_create_flow_action_dest_flow_tbl,
+	.dr_create_flow_action_dest_vport =
+		mlx5_glue_dr_create_flow_action_dest_vport,
 	.dr_create_flow_tbl = mlx5_glue_dr_create_flow_tbl,
 	.dr_destroy_flow_tbl = mlx5_glue_dr_destroy_flow_tbl,
 	.dr_create_ns = mlx5_glue_dr_create_ns,
diff --git a/drivers/net/mlx5/mlx5_glue.h b/drivers/net/mlx5/mlx5_glue.h
index 058e9b1..26f5cb3 100644
--- a/drivers/net/mlx5/mlx5_glue.h
+++ b/drivers/net/mlx5/mlx5_glue.h
@@ -146,6 +146,7 @@ struct mlx5_glue {
 	const char *(*port_state_str)(enum ibv_port_state port_state);
 	struct ibv_cq *(*cq_ex_to_cq)(struct ibv_cq_ex *cq);
 	void *(*dr_create_flow_action_dest_flow_tbl)(void *tbl);
+	void *(*dr_create_flow_action_dest_vport)(void *ns, uint32_t vport);
 	void *(*dr_create_flow_tbl)(void *ns, uint32_t level);
 	int (*dr_destroy_flow_tbl)(void *tbl);
 	void *(*dr_create_ns)(struct ibv_context *ctx,
-- 
1.8.3.1